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Maximum Sum Non Adjacent Elements

1. You are given a number n, representing the count of elements.

2. You are given n numbers, representing n elements.

3. You are required to find the maximum sum of a subsequence with no adjacent elements.

Input Format

A number n

n1

n2

.. n number of elements

Output Format

A number representing the maximum sum of a subsequence with no adjacent elements.

Constraints

1 <= n <= 1000

-1000 <= n1, n2, .. n elements <= 1000

Sample Input

6

5

10

10

100

5

6

Sample Output

116


Solution: 

import java.io.*;

import java.util.*;


public class Main {

    public static void main(String[] args) throws Exception {

        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        int[] arr = new int[n];

        for(int i=0;i<n;i++)

            arr[i] = sc.nextInt();

        

        int ncld = 0, xcld = 0;

        

        for(int i=0;i<n;i++){

            int in = xcld + arr[i];

            xcld = Math.max(ncld,xcld);

            ncld = in;

        }

      

        System.out.println(Math.max(ncld,xcld));

    }

}

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